Late model headers on 98 LS1 - emission question

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Jul 25, 2014 | 02:42 PM

Narco944

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Burning Brakes

Joined: Dec 2013

Posts: 916

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From: Atlanta GA

Late model headers on 98 LS1 - emission question

I have a 98 LS1 vette and am looking to buy a set of Kooks headers from a guy. He told me that these headers were on an 03. He said they will mount up and work but that I will need an air tube from a 2001+ vette or cap the egr bung on the headers.

I live in Atlanta and have to get emissions inspections. When I look up the price of an air tube they are all over $100. Does this all sound accurate? After installing the headers I'm going to get it tuned. Could I just cap off the egr bung and get the emissions stuff tuned out? Or am I better off looking for an air tube?

I've never had aftermarket headers so this is all new to me. I appreciate the help.

Jul 25, 2014 | 02:51 PM

3boystoys

Melting Slicks

Joined: Jul 2012

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Don't think the Vette has an EGR. Should just have to block it off on the headers. You'll need to keep the O2 bung(s) .

Jul 25, 2014 | 04:19 PM

Narco944

Thread Starter

Burning Brakes

Joined: Dec 2013

Posts: 916

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From: Atlanta GA

right, but if I block it off and forget the air tube will I still pass emissions?

Jul 25, 2014 | 08:28 PM

lionelhutz

Race Director

Joined: Apr 2007

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From: South Western Ontario

What does the emissions test involve? If they visually inspect then I'd hook it up, even if you get it tuned out. The capped AIR ports on both headers might raise questions. If they do an OBDII or tailpipe test then you could cap them and remove the AIR system.